Status and distribution of Smilosicyopus species are unclear, as they are rare, difficult to sample and to distinguish. During thirteen years, many specimens were collected by the MNHN and collaborators in Pacific islands, including samples in all type localities. These specimens were compared and sequenced with COI gene. Seven species over the eight known were confirmed; indeed S. mystax is considered to be a synonym of S. leprurus. Further Smilosicyopus species have finally a broader distribution than thought and endemicity seems to be not the main rule in this genus. A key to species is given.